HunterLab ColorFlex L2 CFL2 Spectrophotometer

Overview

The HunterLab ColorFlex L2 CFL2 is a compact, industrial-grade 45°/0° spectrophotometer engineered for high-precision color measurement across diverse sample types—including opaque solids, translucent liquids, powders, granules, pastes, and gels. Its optical architecture employs dual-beam spectral acquisition with a full-spectrum xenon lamp and a fixed grating monochromator, delivering stable, repeatable spectral data from 400 nm to 700 nm at <3 nm resolution. The 45°/0° geometry excludes specular reflectance, ensuring compliance with ISO 7724-1 and ASTM E1164 for diffuse color evaluation—critical for quality control in regulated manufacturing environments. Designed as a direct evolutionary successor to the ColorFlex EZ, the L2 maintains identical illumination geometry and spectral response, enabling seamless migration of legacy standards, tolerance sets, and calibration history without requalification.

Key Features

• Robust 45°/0° optical system: Optimized for consistent inter-instrument agreement (ΔE*2000 < 0.15 on BCRA tiles) and long-term stability under routine QC conditions.
• Industrial-grade touchscreen interface: 7″ high-resolution (1280×800) capacitive display with glove-compatible operation and intuitive navigation—designed for factory floor durability and rapid operator onboarding.
• Essentials 2.0 software platform: Embedded firmware with GLP-compliant audit trail support, auto-naming, timestamped data capture, and automatic backup to USB or network storage.
• NIST-traceable calibration: Supplied with certified white diagnostic tile, black glass standard, and 25 mm aperture insert—all traceable to NIST reference materials per CIE Publication 44 and ASTM E259.
• Multi-standard compatibility: Supports CIE L*a*b*, L*C*h, Yxy, XYZ, Hunter Lab, and industry-specific indices including ASTM E313 whiteness/yellowness, D1925 yellowness, opacity, color strength, gray scale change/stain, and metamerism index.
• Configurable illumination/observer combinations: 12 built-in illuminants (A, C, D50, D55, D65, D75, F2, F7, F11) and dual observer angles (2° and 10°) enable precise simulation of end-use viewing conditions.

Sample Compatibility & Compliance

The ColorFlex L2 accommodates heterogeneous samples without requiring custom fixtures: its 25.4 mm measurement aperture and 31.8 mm illumination zone ensure representative sampling of textured surfaces, coarse particulates, viscous fluids, and semi-crystalline matrices. It meets international metrological requirements for colorimetric instrumentation per ISO/IEC 17025-accredited laboratories and supports FDA 21 CFR Part 11 readiness through user-accessible audit logs, electronic signature prompts, and role-based permission controls within Essentials 2.0. All measurements adhere to CIE 15:2004 spectral computation conventions and are validated against BCRA Series II ceramic tiles—ensuring traceability to primary national standards.

Software & Data Management

Essentials 2.0 provides embedded data governance features essential for GMP/GLP workflows: time-stamped pass/fail results with configurable tolerances, automated averaging of up to 10 sequential readings, spectral deviation alerts, and real-time comparison against master standards. Data export is native to CSV and Excel-compatible formats; USB flash drive integration enables secure transfer of instrument configurations, calibration files, and measurement histories between units. HDMI video output supports external display for training or line-side review, while Ethernet connectivity allows centralized fleet management via HunterLab’s optional Enterprise Dashboard.

Applications

Validated across food & beverage (coffee, cheese, juice, sauces, dairy), pharmaceuticals (tablet coating, excipient consistency), paints & coatings (powder coatings, baked enamel panels), construction materials (cement, concrete, grout), personal care (soaps, shampoos, toothpaste), and industrial chemicals (resins, dyes, adhesives), the ColorFlex L2 delivers metrologically sound color data for raw material acceptance, in-process verification, and final product release. Its ability to resolve subtle batch-to-batch chromatic shifts—particularly in low-chroma or high-gloss materials—supports sustainability initiatives by minimizing off-spec production and rework.

FAQ

Is the ColorFlex L2 compatible with existing ColorFlex EZ standards and methods?
Yes. Identical 45°/0° geometry, spectral response, and calibration algorithms ensure full backward compatibility—standards, tolerances, and historical datasets migrate directly without recalibration or revalidation.

Does the instrument support regulatory compliance for pharmaceutical or food manufacturing?
It meets foundational requirements for ISO 9001, ISO 22000, and ICH Q5E through documented traceability, repeatability performance, and audit-ready data logging. Optional validation packages support IQ/OQ protocols aligned with FDA 21 CFR Part 11 and EU Annex 11.

What maintenance is required beyond routine calibration?
No optical alignment or lamp replacement is needed during the 10-year xenon lamp service life. Daily verification uses the supplied NIST-traceable white tile; annual verification against BCRA tiles is recommended for ISO/IEC 17025 conformance.

Can the device measure transparent or translucent liquids?
Yes—using the optional liquid cell holder (sold separately), the L2 performs transmission measurements compliant with ASTM D1209 (APHA) and D5386 (CIELAB for clear liquids), with integrated pathlength compensation.

Is remote diagnostics or firmware update capability available?
Firmware updates are performed via USB or Ethernet using HunterLab’s Secure Update Utility; remote diagnostics require prior authorization and encrypted session initiation through HunterLab Technical Support.